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SSC JE Electrical 2019 with solution SET-2

SSC JE Electrical 2019 with solution SET-2
Which of the following is the correct way of expressing the rating of a fuse?

Ampere-hours
Watts
Volts
Amperes

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SSC JE Electrical 2019 with solution SET-2
 The number of valence electrons of P and Si are respectively?

5 and 4
4 and 4
3 and 4
4 and 5

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Phosphorus (P) has 15 electron i.e 2,8,5. Hence the number of electron in its outermost orbit is 5.
Silicon (Si) has 14 electron i.e 2,8,4. Hence the number of electrons in its outermost orbit is 4.

SSC JE Electrical 2019 with solution SET-2
A diode appears as in forward region of its characteristics?

An ON switch
An OFF switch
A capacitor
A high resistor

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A P-N junction acts as a voltage-controlled switch. During forward biasied the p-n junction diode acts like an ON switch. When reverse biased, it acts like an OFF switch.
 


SSC JE Electrical 2019 with solution SET-2
If ‘V’ is the voltage phasor and ‘I’ is the current phasor, then VI represents

Active power
Reactive power
Total power
Apparent power

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Apparent Power (S): It is defined as the product of r.m.s value of voltage (V) and current (1). It is denoted by S.
S = V/I Volt Ampere

SSC JE Electrical 2019 with solution SET-2
The urban service speed-time curve has no

Braking period
Acceleration period
Coasting period
Free-running period

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SSC JE Electrical 2019 with solution SET-2
The total number of possible phase sequences for a three-phase AC system is ____

1
3
2
0

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A phase sequence is an order or sequence in which the currents or voltages of different phases attain their maximum values. In a three-phase system, there are only two possible phase sequences: R-Y-B (positive Phase Sequence) and R-B-Y (Negative Phase Sequence).

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